Method for making printing plate

A method for making a printing plate comprising:

• ejecting an ink onto a printing original plate from an ink jet head, the ink containing water, a pigment, a resin, a first organic compound having a boiling point of 260° C. or more at 1 atmospheric pressure or a melting point of 90° C. or more at 1 atmospheric pressure, and a second organic compound having a boiling point in the range of 100 to 250° C. at 1 atmospheric pressure, the ink satisfying expressions (1) to (3):
• 5% by mass<(C)<25% by mass (1);
• {(C)+(D)}≧12% by mass (2);
• and
• 0.25≦{(A)+(B)}/{(C)+(D)}≦0.5 (3),
• wherein (A), (B), (C) and (D) represent the pigment content, the resin content, the first organic compound content, and the second organic compound content in the ink, respectively.